To understand is to know what causes what.
The past is a ghost, the future a dream, and all we ever have is now.
释义:无论是贤能还是平庸的人,一旦进入朝廷就容易遭到嫉妒;无论是美丽还是平常的女子,一旦进入后宫就容易遭受妒忌。